Includes two charts: Chart 1 shows the tracks of all the operating vessels; Chart 2 shows the location of al the mine fields with the number of mines in the area covered and when and how they were removed or destroyed.

From 1881 to 1886 Johan August Udden investigated the contents and structure of mounds south of the Smoky Hill River in Kansas. The author presents brief descriptions and photographs of the objects found in the mounds.

Papers, Addresses, Reports: The Development of Smokeless Fuel from Illinois Coal; The Irwin Expedition about Cerro de Pasco and Lake Titicaca; Preserves of Natural Conditions; Gaining and Losing Power; Report on the Progress and Condition of...

Papers, Symposia, Addresses, Reports: Secretary's Report; Treasurer's Report; Dr. Amos Willard French, In Memoriam; A Work Needing to be Done by the Academy; The Vegetational History of a Blowout (abstract); Recent Habitat Changes in the...

Papers, Addresses, Reports: On Popularizing Science; Geology of the Joliet District; The Genus Peperomia in Northeastern South America; The American Bithynia Not Wholly an Introduced Species; Growth of Diatoms in Relation to Dissolved Gases;...